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Investment in OC-BVI - Assets and liabilities (Details) - Ocean Conversion (BVI) Ltd [Member] - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
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Investment in OC-BVI |  |
Current assets | $ 1,151,398 | $ 2,286,179
Non-current assets | 3,446,198 | 3,859,310
Total assets | 4,597,596 | 6,145,489
Current liabilities | 156,040 | 132,005
Non-current liabilities | 684,450 | 1,048,950
Total liabilities | $ 840,490 | $ 1,180,955

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